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Title: US5685079: Locking mechanism for a folding knife
[ Derwent Title ]


Country: US United States of America

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12 pages

 
Inventor: Brothers, Robert L.; Colville, WA 99114
Taylor, Bruce R.; Sagle, ID 83860

Assignee: None

Published / Filed: 1997-11-11 / 1996-09-23

Application Number: US1996000717760

IPC Code: Advanced: B26B 1/04;
IPC-7: B26B 1/02;

ECLA Code: B26B1/04;

U.S. Class: Current: 030/161; 030/155;
Original: 030/161; 030/155;

Field of Search: 030/155,157,158,160,161,337

Priority Number:
1996-09-23  US1996000717760

Abstract:     A folding knife is disclosed having a unique locking mechanism which prevents the blade from being closed when the knife is in use. The locking mechanism provides a rolling lock carried by the knife mechanism having a lever that is movable between two positions. In an unlocked position, the blade may be rotated between the extended and closed positions. With the lever in the locked position, the blade is held in the extended position. The blade provides a base having a cam surface and a notch in that surface. The rolling lock provides a cylindrical body having a notch. When the rolling lock lever is in the unlocked position and the blade is extended, the notch in the cylindrical body of the rolling lock occupies the same space as the notch in the cam surface of the blade, allowing the cam surface of the base of the blade to rotate through the notch in the rolling lock. When the rolling lock lever is in the locked position, the notch in the cylindrical body of the rolling lock is rotated away from the blade, and the cylindrical body of the rolling lock is present in the notch in the blade. As a result, the blade will not pivot unless sufficient force is applied to the blade to shear the cylindrical body of the rolling lock.

Attorney, Agent or Firm: Thompson, David S. ;

Primary / Asst. Examiners: Payer, Hwei-Siu;

INPADOC Legal Status: Show legal status actions

Family: None

First Claim:
Show all 7 claims
What is claimed is:     1. A folding knife, comprising:
  • (a) a knife mechanism, comprising:
    • (a) a left plate having a pivot bolt hole carrying a blade pivot bolt, a hole for a rolling lock mechanism and a blade latch mechanism hole;
    • (b) a right plate having a pivot bolt hole carrying the blade pivot bolt, a hole for the rolling lock mechanism and a spring retainer hole; and
    • (c) front and rear spacers, the front spacer having a half-round recess and a threaded adjustment hole, the spacers separating the left plate and the right plate;
  • (b) a blade, carried by the knife mechanism by means of the pivot bolt, the pivot bolt carried by the pivot bolt holes, comprising:
    • (a) a cutting edge;
    • (b) a rear edge; and
    • (c) a base having a pivot bolt hole and a cam surface having a notch;
  • (c) adjustment bolt means, carried by the threaded adjustment hole, for regulating the exact degree to which the blade may be moved in an open position by making contact with the rear edge of the blade, thereby allowing a user to fine-tune the degree to which the blade may be rotated;
  • (d) the rolling lock mechanism, carried by the knife mechanism, comprising:
    • (a) a cylindrical body having a notch;
    • (b) a lever attached to the body;
    • (c) an end surface having a retainer slot; and
    • (d) a spiral spring, carried by the retainer slot in the end surface and by the spring retainer hole of the right plate of the knife mechanism, biasing the cylindrical body to a position wherein the notch of the cylindrical body is rotated away from the notch in the cam surface of the base of the blade, whereby the cylindrical body occupies the space outlined by the notch in the blade and prevents rotation of the blade about the pivot bolt;
  • (e) a left handle shell, having a textured outside surface and an inside surface, attached to the left plate of the knife mechanism, the left handle shell having a rear attachment bolt hole, a middle attachment bolt hole and a knife blade pivot hole, additionally comprising:
    • (a) dimple means for carrying a blade latch mechanism; and
    • (b) a recessed surface, adjacent to the inside surface, the recessed surface forming a cavity between the left handle shell and the knife mechanism adjacent to the lever of the rolling lock mechanism, whereby the lever may be moved by a user through the cavity formed;
  • (f) a right handle shell, having a textured outside surface and an inside surface, attached to the right plate of the knife mechanism, the right handle shell having a rear attachment bolt hole, a middle attachment bolt hole and a knife blade pivot hole, additionally comprising a recessed surface, adjacent to the inside surface, the recessed surface forming a cavity between the right handle shell and the knife mechanism adjacent to the end surface having the retainer slot of the rolling lock mechanism, whereby the spiral spring may be carried in the cavity formed; and
  • (g) blade latch means for preventing the blade from opening in an unintended manner, comprising:
    • (a) a detent spring, carried by the dimple of the left handle shell;
    • (b) a ball having a flat side, the flat side contacted by the detent spring; and
    • (c) a dimple in the base of the blade, sized to receive the ball, whereby contact between the dimple of the blade and the ball of the blade latch means provides a slight frictional resistance to the blade opening.


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Description: Show description

Forward References: Show 46 U.S. patent(s) that reference this one

       
U.S. References: Go to Result Set: All U.S. references   |  Forward references (46)   |   Backward references (11)   |   Citation Link

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Patent  Pub.Date  Inventor Assignee   Title
Get PDF - 3pp US364414* 1887-06 Hollweg    
Get PDF - 3pp US727724  1903-05 Weil   POCKET-KNIFE.
Get PDF - 4pp US1782901* 1930-11 Kassel    
Get PDF - 4pp US4120088  1978-10 Phelps   Key-lock knife
Get PDF - 5pp US4177560  1979-12 Sakurai   Safety knife
Get PDF - 6pp US4240201  1980-12 Sawby   Folding knife
Get PDF - 6pp US4425709  1984-01 Quenzi   Pocket tool
Get PDF - 9pp US4604803  1986-08 Sawby   Folding knife
Get PDF - 5pp US4979301  1990-12 Walker   Locking mechanism for folding blade knife
Get PDF - 4pp US5093995  1992-03 Jan   Knife lock mechanism
Get PDF - 15pp US5331741  1994-07 Taylor   Lever-actuated folding knife
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Foreign References:
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Publication Date IPC Code Assignee   Title
  DE0038553 1886-05       


Other Abstract Info: DERABS G97-557662 DERG97-557662

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